This chapter reports findings on two studies that culminated in the development of a multilevel intervention to improve access to health care among chronic drug users. The first two studies began with an investigation of the health care delivery system serving chronic drug users in Miami-Dade County, Florida from the perspectives of both consumers and providers. These studies documented the health care needs and use patterns of chronic drug users as well as the practices and perspectives of the providers who served them. Findings indicated that (1) chronic drug users demonstrated greater health care needs than nondrug users; (2) chronic drug users were less likely to receive appropriate health care services; and (3) the gap between services needed and services actually provided can be ameliorated. By participating in our multilevel intervention, both health care providers and health care consumers changed attitudes and behaviors resulting in the provision of appropriate, accessible, and acceptable health care.